Here is the full list of all 40 XIII achievements.
Complete the campaign on easy difficulty.
Obtain all achievements.
Destory the armor of a fully armored enemy, then kill him with a melee attack.
Complete the campaign on medium difficulty.
Find all collectible items.
Find all the documents.
Find 15 documents.
Find 10 documents.
Find 5 documents.
Destroy a punching bag.
Stab 15 enemies from behind without being noticed.
Die more than 25 times.
Eliminate 20 enemies with improvised weapons.
Make it through a level without shooting anyone.
Crash everything at the beach house.
Complete the Sanctuary cliff section in under 3 minutes.
Complete the campaign on the highest difficulty.
Eliminate 5 enemies in a row without alerting them.
Find the secret entrance to the Sanctuary.
Empty the Revolver using the alternative fire mode without missing any shots.
Complete a level without being damaged.
Find your first document.
Eliminate 3 or more enemies with one grenade.
Swings from a grappling hookc to another 3 times without touching the floor.
Have XIII drown.
Escape the Canyons on a jet.
Eliminate 6 enemies with one magazine of the Revolver.
Eliminate 5 enemies in a row with a headshot with the Dragunov.
Kill 4 enemies at once with the Bazooka.
Unlock 15 doors.
Eliminate 10 enemies without getting hurt.
Get 20 pieces of armor.
Find your first collectable item.
Find a way into Emerald Base.
Find 10 medkits.
Get full armor.
Kill an enemy with the last bullet of the revolver.
Eliminate 15 enemies with a headshot in one level.
Eliminate 5 enemies with your fists in a row.
Reach the truck in Brighton Beach.